Experimental study of the structure of chalcogenide glassy semiconductors in three-component systems of Ge-As-Se and As-Sb-Se by means of NQR and EPR spectroscopy

• Autorzy: Olga Bolebrukh , Nikolay Sinyavsky , Irina Korneva , Bernadeta Dobosz , Michal Ostafin , Boleslaw Nogaj , Ryszard Krzyminiewski
• Języki publikacji: EN

Abstrakty

EN

The structure of chalcogenide glassy semiconductors in three-component systems of Ge-As-Se and As-Sb-Se has been studied by means of both NQR (nuclear quadrupole resonance) and EPR (electron paramagnetic resonance) spectroscopy. It is investigated that in the glasses of both systems the value of the electric field gradient at the resonating nuclei grows with increasing concentration of the clusters As2Se3 and Sb2Se3, thereby increasing the NQR resonance frequencies. It appears that for the Ge-As-Se system the structural transition from a two-dimensional to three-dimensional structure occurs at average coordination number $\bar r$ = 2.45. The EPR spectral parameters of glasses depend on the composition, the average coordination number and the temperature, and these are discussed. The effect of ”ageing” for CGS (chalcogenide glassy semiconductors) of As-Sb-Se system due to partial crystallization of the sample is observed from the EPR spectra.

Słowa kluczowe

EN

nuclear quadrupole resonance; disordered solids; semiconductors; electron paramagnetic resonance

• Czasopismo: Open Physics
• Rocznik: 2013
• Tom: 11
• Numer: 12
• Strony: 1686-1693

Daty

wydano

2013-12-01

online

2013-12-20

Twórcy

autor

Olga Bolebrukh

• Laboratory of Magnetic Resonance, Institute of Physics and Technology, Immanuel Kant Baltic Federal University, A. Nevski 14, 236041, Kaliningrad, Russia

autor

Nikolay Sinyavsky

• Division of Physics, Department of Radio Engineering, Baltic State Academy of Fishing Fleet, Molodiozhnaya 6, 236029, Kaliningrad, Russia

autor

Irina Korneva

• Division of Physics, Department of Radio Engineering, Baltic State Academy of Fishing Fleet, Molodiozhnaya 6, 236029, Kaliningrad, Russia,

autor

Bernadeta Dobosz

• Division of Medical Physics, Department of Physics, Adam Mickiewicz University in Poznan, Umultowska 85, 61-614, Poznan, Poland

autor

Michal Ostafin

• Division of Medical Physics, Department of Physics, Adam Mickiewicz University in Poznan, Umultowska 85, 61-614, Poznan, Poland

autor

Boleslaw Nogaj

• Division of Medical Physics, Department of Physics, Adam Mickiewicz University in Poznan, Umultowska 85, 61-614, Poznan, Poland

autor

Ryszard Krzyminiewski

• Division of Medical Physics, Department of Physics, Adam Mickiewicz University in Poznan, Umultowska 85, 61-614, Poznan, Poland

Bibliografia

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Identyfikatory

DOI

10.2478/s11534-013-0329-7